Gray Wolf
Winter Wolf
Sorry to jump in once again, but the pic you pointed to is not from Conquest, it is from the "vanilla" Civ3 game. I don't know how you got to play Conquest with Vanilla rules, but it is not a true Conquest game. The tech tree I posted is the standard Conquest tech tree for an epic game without any alteration of the rules. The Conquest.biq uses Radio for sure, the pic I posted came from it.
I think I found the answer to this.
I bought Civ 3 Complete which installs Conquests version 1.22.
The readme.txt file that comes with the game (attached) has a section that describes all corrections and changes that were done in versions 1.20+
Here's a list of some of the changes that were made in v 1.20:
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SID MEIER'S CIVILIZATION III: Conquests README
...
v1.20 Fixes, Changes, Additions
...
Changes:
* Histograph keeps tracking defeated Civs
* Electronics requirement removed from Motorized Transportation
* Radio Tech removed
* Civil Defense requires Electronics
* Advanced Flight now requires Electronics
* Radar Towers require Advanced Flight
...
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So there were earlier versions of Civ3 that used the Radio Tech and I guess you are using an earlier version of the conquests.biq file.
I'm going to re-word the script.txt section of my tutorial and emphasize how all techs need to be a mirror image of the .BIQ file list and be in the same order. And I'll let people know that if they are using Conquests 1.20+, they will need to remove the radio tech. (DONE)